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Osteopygis backmani
Taxonomy
Clemmys backmani was named by Russell (1934). Its type specimen is CMN 8685 and is a 3D body fossil. Its type locality is Clemmys site, Big Muddy Valley, which is in a Puercan terrestrial horizon in the Ravenscrag Formation of Canada.
It was recombined as Judithemys backmani by Brinkman et al. (2010), Brinkman (2013); it was considered a nomen dubium by Bartels (1983), Holman and Fritz (2001), Parham and Hutchison (2003); it was recombined as Osteopygis backmani by Gentry et al. (2023).
It was recombined as Judithemys backmani by Brinkman et al. (2010), Brinkman (2013); it was considered a nomen dubium by Bartels (1983), Holman and Fritz (2001), Parham and Hutchison (2003); it was recombined as Osteopygis backmani by Gentry et al. (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1934 | Clemmys backmani Russell |
| 2010 | Judithemys backmani Brinkman et al. |
| 2013 | Judithemys backmani Brinkman |
| 2023 | Osteopygis backmani Gentry et al. |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Osteopygis backmani Russell 1934
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. D. Gentry et al. 2023 | Osteopygis backmani can be diagnosed as a representative of Osteopygis by the set of shell characters listed for the genus above. Osteopygis backmani can be differentiated from other species of Osteopygis by the presence of a pronounced carapacial gutter extending to the bridge peripherals. Brinkman (2013) describes a specimen of O. backmani from the upper Paleocene of Alberta that has an associated lower jaw with symphyseal and lateral ridges on the triturating surface. The presence of these ridges differs from the lower jaws of J. sukhanovi, the only other North American “macrobaenid” for which a lower jaw is described. |